Erasca, Inc.

ERASNASDAQHealthcare● Active

$12.57

+$0.60(+5.01%)

Market Cap$3.9B

P/E Ratio—

52W High$24.28

52W Low$1.21

Avg Volume6.9M

Open$12.53

Beta0.73

Overview

Erasca, Inc. (ERAS) Insider Trading

Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.

SEC EDGAR · FMP · ERAS · as of Jun 8, 2026

Activity summary

Buy transactions

P-Purchase only

Sell transactions

12 Months

Buy/Sell ratio

0.00

Buy/Sell (by trades)

Overall sentiment

BEARISH

↑ Buy 0%Active transactions only · RSU vesting excluded100% Sell ↓

Erasca, Inc. insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.

▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only

As of Jun 8, 2026

ERAS insider buying and selling by quarter

ERAS insider selling · ERAS insider buying stocks · quarterly insider activity

Total insider buying (incl. awards)Total insider selling

5.0M2.5M0

2024 Q1

2024 Q2

2024 Q4

2025 Q1

2025 Q2

2025 Q4

2026 Q1

2026 Q2

Mobile shows last 4Q · Desktop shows full 8Q

▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters

As of Jun 8, 2026

Active insiders

Most active in past 12 months · ERAS ceo insider trading

Showing all insiders · Click a card to filter the transactions table below

▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API

Recent insider transactions

ERAS executive sell shares · ERAS board member insider trading · ERAS insider trading SEC filing

Showing 31 most recent · Common Stock · Form 4 only

Scroll horizontally to see all columns

Date	Insider	Type	Shares	Price	Value	After trans.	Filing
Apr 1, 2026	Garner Ebun Chief Legal Officer	Option	80,000	$1.70	$136K	105,076	Form 4
Apr 1, 2026	Garner Ebun Chief Legal Officer	Sale	80,000	$16.40	$1.31M⚡	25,076	Form 4
Mar 4, 2026	Morris Shannon Chief Medical Officer	Option	20,000	$1.70	$34K	20,000	Form 4
Mar 4, 2026	Morris Shannon Chief Medical Officer	Sale	20,000	$15.04	$301K	0	Form 4
Dec 15, 2025	Chacko David M. CFO and CBO	Other	17,793	$1.19	$21K	279,980	Form 4
Jan 7, 2026	Garner Ebun General Counsel & Corp. Sec.	Option	120,000	$1.70	$204K	145,076	Form 4
Jan 7, 2026	Garner Ebun General Counsel & Corp. Sec.	Sale	120,000	$5.59	$671K	25,076	Form 4
Dec 15, 2025	Garner Ebun General Counsel & Corp. Sec.	Award	3,902	$1.19	$5K	25,076	Form 4
Dec 13, 2024	Chacko David M. CFO and CBO	Other	12,324	$1.56	$19K	262,187	Form 4
Dec 13, 2024	Garner Ebun General Counsel & Corp. Sec.	Other	5,731	$1.56	$9K	21,174	Form 4
May 21, 2024	Casdin Alexander W. Director	Purchase	80,000	$2.27	$182K	573,974	Form 4
Dec 15, 2023	Chacko David M. CFO and CBO	Other	7,478	$1.59	$12K	246,726	Form 4
Dec 15, 2023	Garner Ebun General Counsel & Corp. Sec.	Other	5,448	$1.59	$9K	9,728	Form 4
Dec 6, 2023	Start Valerie Denise Harding Director	Purchase	10,000	$1.85	$18K	20,000	Form 4
Dec 6, 2023	Lim Jonathan E Chairman & CEO · Director	Purchase	278,150	$1.72	$478K	12,899,360	Form 4
Dec 5, 2023	Lim Jonathan E Chairman & CEO · Director	Purchase	721,850	$1.69	$1.22M⚡	12,899,360	Form 4
Dec 4, 2023	Casdin Alexander W. Director	Purchase	30,000	$1.66	$50K	493,974	Form 4
Oct 5, 2023	Lim Jonathan E Chairman & CEO · Director	Purchase	1,000,000	$2.03	$2.03M⚡	19,456,216	Form 4
Jun 8, 2023	Lim Jonathan E Chairman & CEO · Director	Purchase	100,000	$2.75	$275K	18,396,216	Form 4
Apr 10, 2023	Casdin Alexander W. Director	Purchase	20,000	$2.76	$55K	463,974	Form 4
Mar 28, 2023	Lim Jonathan E Chairman & CEO · Director	Purchase	100,000	$2.84	$284K	18,296,216	Form 4
Feb 1, 2023	Chacko David M. CFO	Other	1,748	$4.10	$7K	239,248	Form 4
Feb 1, 2023	Chacko David M. CFO	Other	2	$3.89	$8	239,248	Form 4
Feb 1, 2023	Wei Lin Chief Medical Officer	Other	1,748	$4.10	$7K	315,812	Form 4
Feb 1, 2023	Wei Lin Chief Medical Officer	Other	2	$3.89	$8	315,812	Form 4

Garner Ebun

Chief Legal Officer

Option

Date

Apr 1

80,000

Price

$1.70

Value

$136K

View Form 4 on SEC.gov

Garner Ebun

Chief Legal Officer

Sale

Date

Apr 1

80,000

Price

$16.40

Value

$1.31M ⚡

View Form 4 on SEC.gov

Morris Shannon

Chief Medical Officer

Option

Date

Mar 4

20,000

Price

$1.70

Value

$34K

View Form 4 on SEC.gov

Morris Shannon

Chief Medical Officer

Sale

Date

Mar 4

20,000

Price

$15.04

Value

$301K

View Form 4 on SEC.gov

Chacko David M.

CFO and CBO

Other

Date

Dec 15

17,793

Price

$1.19

Value

$21K

View Form 4 on SEC.gov

Garner Ebun

General Counsel & Corp. Sec.

Option

Date

Jan 7

120,000

Price

$1.70

Value

$204K

View Form 4 on SEC.gov

Garner Ebun

General Counsel & Corp. Sec.

Sale

Date

Jan 7

120,000

Price

$5.59

Value

$671K

View Form 4 on SEC.gov

Garner Ebun

General Counsel & Corp. Sec.

Award

Date

Dec 15

3,902

Price

$1.19

Value

$5K

View Form 4 on SEC.gov

Chacko David M.

CFO and CBO

Other

Date

Dec 13

12,324

Price

$1.56

Value

$19K

View Form 4 on SEC.gov

Garner Ebun

General Counsel & Corp. Sec.

Other

Date

Dec 13

5,731

Price

$1.56

Value

$9K

View Form 4 on SEC.gov

Casdin Alexander W.

Director

Purchase

Date

May 21

80,000

Price

$2.27

Value

$182K

View Form 4 on SEC.gov

Chacko David M.

CFO and CBO

Other

Date

Dec 15

7,478

Price

$1.59

Value

$12K

View Form 4 on SEC.gov

Garner Ebun

General Counsel & Corp. Sec.

Other

Date

Dec 15

5,448

Price

$1.59

Value

$9K

View Form 4 on SEC.gov

Start Valerie Denise Harding

Director

Purchase

Date

Dec 6

10,000

Price

$1.85

Value

$18K

View Form 4 on SEC.gov

Lim Jonathan E

Chairman & CEO · Director

Purchase

Date

Dec 6

278,150

Price

$1.72

Value

$478K

View Form 4 on SEC.gov

Lim Jonathan E

Chairman & CEO · Director

Purchase

Date

Dec 5

721,850

Price

$1.69

Value

$1.22M ⚡

View Form 4 on SEC.gov

Casdin Alexander W.

Director

Purchase

Date

Dec 4

30,000

Price

$1.66

Value

$50K

View Form 4 on SEC.gov

Lim Jonathan E

Chairman & CEO · Director

Purchase

Date

Oct 5

1,000,000

Price

$2.03

Value

$2.03M ⚡

View Form 4 on SEC.gov

Lim Jonathan E

Chairman & CEO · Director

Purchase

Date

Jun 8

100,000

Price

$2.75

Value

$275K

View Form 4 on SEC.gov

Casdin Alexander W.

Director

Purchase

Date

Apr 10

20,000

Price

$2.76

Value

$55K

View Form 4 on SEC.gov

Lim Jonathan E

Chairman & CEO · Director

Purchase

Date

Mar 28

100,000

Price

$2.84

Value

$284K

View Form 4 on SEC.gov

Chacko David M.

CFO

Other

Date

Feb 1

1,748

Price

$4.10

Value

$7K

View Form 4 on SEC.gov

Chacko David M.

CFO

Other

Date

Feb 1

Price

$3.89

Value

View Form 4 on SEC.gov

Wei Lin

Chief Medical Officer

Other

Date

Feb 1

1,748

Price

$4.10

Value

$7K

View Form 4 on SEC.gov

Wei Lin

Chief Medical Officer

Other

Date

Feb 1

Price

$3.89

Value

View Form 4 on SEC.gov

⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar

1 / 2

▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —

About ERAS insider trading

ERAS insider trades

Erasca, Inc. (ERAS) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including Garner Ebun (Chief Legal Officer), Morris Shannon (Chief Medical Officer), Chacko David M. (CFO and CBO). Over the past 12 months, 3 insiders have filed transactions with the SEC. ERAS insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.

For Erasca, Inc.'s institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →

Buy/Sell signal logic

acquisitionOrDisposition field:

A = Acquisition (buy) · D = Disposition (sell)

RSU vesting (M-Exempt) excluded from sentiment

Form 4SEC filing required within 2 business days of any insider transaction

10b5-1Pre-scheduled trading plan that allows insiders to sell on autopilot

Open MktDirect purchase or sale on the open market (excludes awards, options)

Ownership SEC filings Financial statements Price history Forecast & ratings Earnings

Frequently asked questions

ERAS insider trading · 5 questions

The insiders of Erasca, Inc. (ERAS) include executives and directors such as Garner Ebun (Chief Legal Officer), Morris Shannon (Chief Medical Officer), Chacko David M. (CFO and CBO), among others. Over the past 12 months, 3 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.

ERAS board member insider tradingwho are ERAS insidersERAS insider rosterErasca, Inc. executives insider activity

▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 8, 2026